WO2023166830A1 - Procédé, dispositif et programme pour effectuer une optimisation d'analyse d'une structure de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile, ainsi que procédé de fabrication d'un élément de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile - Google Patents

Procédé, dispositif et programme pour effectuer une optimisation d'analyse d'une structure de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile, ainsi que procédé de fabrication d'un élément de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile Download PDF

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Publication number
WO2023166830A1
WO2023166830A1 PCT/JP2022/047586 JP2022047586W WO2023166830A1 WO 2023166830 A1 WO2023166830 A1 WO 2023166830A1 JP 2022047586 W JP2022047586 W JP 2022047586W WO 2023166830 A1 WO2023166830 A1 WO 2023166830A1
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Prior art keywords
load
vehicle body
optimization
analysis
optimization analysis
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Ceased
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PCT/JP2022/047586
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English (en)
Japanese (ja)
Inventor
遼 揚場
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JFE Steel Corp
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JFE Steel Corp
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Priority to KR1020247026681A priority Critical patent/KR20240128107A/ko
Priority to CN202280093049.9A priority patent/CN118715520A/zh
Priority to MX2024010366A priority patent/MX2024010366A/es
Priority to EP22929972.2A priority patent/EP4475029A4/fr
Publication of WO2023166830A1 publication Critical patent/WO2023166830A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/157—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body for side impacts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/02—Side panels
    • B62D25/025—Side sills thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/06—Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/10—Numerical modelling
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention is an optimal load transmission structure that distributes the crashworthiness load input to the body frame parts during an automobile collision and transmits it to multiple load bearing members.
  • the present invention relates to an optimization analysis method, apparatus and program for a load transfer structure in an automobile body frame part for obtaining a load transfer structure, and a method for manufacturing a load transfer member in an automobile body frame part.
  • the percentage of electric vehicles (battery powered vehicles) in global car sales is expected to increase rapidly in the future.
  • the features of the body structure of electric vehicles that differ greatly from conventional engine vehicles (gasoline engine cars) include the installation of a large-capacity battery and its protective structure.
  • the side impact test of automobiles is an item for evaluating occupant injuries in many car assessments. In the side collision test of electric vehicles, the collision load input to the vehicle from the pole is concentrated load, and the distance from the position where the pole collides to the battery is short. However, it can be said that it is a particularly severe crash test.
  • FIG. 8 shows a vehicle body 100 of an electric vehicle in which a battery 101 is installed in a battery case 103 comprising an upper battery case 103a and a lower battery case 103b.
  • the vehicle body 100 has side sills 105, floor cross members 107, and battery case fixing parts 109, as shown in FIG.
  • the side sill 105 serves as a crashworthiness energy absorption part (hereinafter also referred to as an EA part) that absorbs collision energy when the pole 200 collides from the outside in the width direction of the vehicle body and a collision load is input.
  • EA part crashworthiness energy absorption part
  • These multiple load-bearing parts are arranged so as to abut on the side sill 105, and provide a load transfer path for distributing the collision load input to the side sill from the collision load input portion of the side sill to the load-bearing parts.
  • a load transfer path for distributing the collision load input to the side sill from the collision load input portion of the side sill to the load-bearing parts.
  • This load transmission structure must be a high-strength structure that can sufficiently absorb the impact energy from the outside, while the load transmitted to the load-bearing parts (hereinafter referred to as "transferred load”) must be It must be less than the loading capacity of each load-bearing part. In order to satisfy this condition, it is important for the side sill 105 having a load-transmitting structure to properly distribute the transmitted load to each load-bearing component.
  • the restraining positions of the automotive body model and multiple input loads and their input positions are set as crashworthiness analysis conditions and set. It is possible to find the optimum shape of the body frame parts, etc., that achieves the target conditions with respect to a plurality of input loads. Examples of target conditions include minimum strain energy, minimum stress, and maximum absorbed energy.
  • target conditions include minimum strain energy, minimum stress, and maximum absorbed energy.
  • the combination of the constraint condition and the target condition shown in Patent Document 1 when a collision load is input to a vehicle body provided with a vehicle body frame part and a load-bearing part, a plurality of load-bearing parts are separated from the body frame part. The size and distribution of the load transmitted to are not guaranteed. In particular, in the vehicle body 100 of the electric vehicle shown in FIG.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide an optimum load transmission structure for distributing the collision load input to the body frame parts at the time of an automobile collision and transmitting it to a plurality of load-bearing parts.
  • the object is to provide an optimization analysis method, apparatus, and program for a load transmission structure in an automobile body frame part, and a method for manufacturing a load transmission part in the automobile body frame part.
  • the load in the direction opposite to the input direction of the acting collision load (hereinafter referred to as reaction force) is the same magnitude even if the direction in which the load acts is opposite. , the total reaction force from each load-bearing part is equal to the collision load input to the body frame part.
  • the reaction force acting in the direction opposite to the input direction of the collision load from each load-bearing part is We paid attention to the point that it is also a load transmission structure that transmits the collision load in the opposite direction to the body frame parts that input it.
  • the magnitude and distribution of the load transmitted to each load-bearing part which should be guaranteed, is reinterpreted as the magnitude and distribution of the reaction force of each load-bearing part, and the sum of the reaction forces of each load-bearing part is input to the body frame parts.
  • Appropriately distributed reaction force is transmitted from each load-bearing part in the direction opposite to the input direction of the collision load to the body frame parts to which the collision load is applied.
  • the present invention is based on such findings, and specifically has the following configuration.
  • An optimization analysis method for a load transmission structure in a vehicle body frame part of an automobile distributes a collision load input to the vehicle body frame part at the time of a collision of an automobile comprising a vehicle body frame part and a plurality of load-bearing parts.
  • a computer performs the following steps to obtain an optimum load transmission structure for transmitting the load to the plurality of load-bearing parts, wherein the vehicle body frame part and the load-bearing part are planar elements (two-dimensional A vehicle body model acquisition step of acquiring a vehicle body model of all or part of the vehicle modeled with elements and/or three-dimensional elements, and the load transmission structure in the vehicle body model can be arranged A design space setting process for setting a region as a design space, and an optimization block model for generating an optimization block model that is modeled with three-dimensional elements in the set design space and performs optimization analysis processing.
  • the load is transmitted to each of the impact load input portion and the plurality of load-bearing parts to the portion to which the impact load is input in the vehicle body frame part of the optimized analysis model.
  • a load condition that is set as the reaction force of the collision load for each of them and is used as an input load to the optimization analysis model; a constraint condition that constrains the displacement of the collision load input part; and a predetermined objective function as the optimization analysis conditions for the optimization analysis in the optimization analysis step, and if the displacements of the plurality of load transmission parts are equal and an optimization analysis condition setting step for setting the constraints.
  • the volume constraint ratio of the optimization block model is set to a predetermined value within the range of 3% or more and 7% or less of the volume of the entire design space. It is preferable to set the following and perform optimization analysis using the densimetry of topology optimization in the optimization analysis step.
  • the vehicle body frame component is a side sill disposed on the side of the vehicle and extending in the longitudinal direction of the vehicle, and the load-bearing component is a battery that connects a battery case disposed under the vehicle to the side sill.
  • the car body model is used as the case fixing part and the floor cross member, and side collision analysis is performed in which the pole collides with the side sill from the outside in the car body width direction in the car body model.
  • the transmission load determination step preferably determines the collision load to be input to the vehicle body frame component and the transmission load to the load-bearing component.
  • a method for manufacturing a load transmission member in a vehicle body frame part according to the present invention uses the load transmission structure optimization analysis method for a vehicle body frame part according to the present invention to determine the structure of the load transmission member of the vehicle body frame part. determining the shape of the load transmission member based on the determined structure of the load transmission member; and manufacturing the load transmission member according to the determined shape.
  • An optimization analysis apparatus for a load transmission structure in a body frame part of an automobile distributes a collision load input to the body frame part in a collision test of an automobile comprising a body frame part and a plurality of load-bearing parts. and the load-bearing parts are modeled by planar elements and/or three-dimensional elements.
  • a vehicle body model acquisition unit that acquires a part of the vehicle body model, a design space setting unit that sets a design space in the area where the load transmission structure is arranged in the vehicle body model, and a three-dimensional element in the set design space an optimization block model generation unit that generates an optimization block model that is modeled in and performs analysis processing for optimizing the load transmission structure; and an optimization analysis that combines the generated optimization block model with the vehicle body model.
  • a combination processing unit that generates a model, an analysis condition setting unit that sets analysis conditions for performing the optimization analysis processing, and an optimization unit that determines the optimum structure of the optimization block model under the set analysis conditions.
  • an optimization analysis unit that performs an optimization analysis, wherein the analysis condition setting unit assigns a collision load input portion to a portion to which the collision load is input in the optimization analysis model, and applies a load to each of the plurality of load-bearing parts.
  • a collision load input part and a load transmission part setting unit for setting a load transmission part as a part to be transmitted in the optimization analysis model, and the optimization analysis model so that the load is equal to or less than the load capacity of each of the plurality of load bearing parts.
  • a load-bearing part transmission load determination unit that determines the transmission load at the load-transmitting part of each load-bearing part by allocating the collision load input to the load-bearing part, and a reaction force of the collision load for each of the plurality of load-transmitting parts
  • Load constraint condition setting for setting a load condition that sets the transmission load to each load-bearing part as an input load to the optimization analysis model, and a constraint condition that constrains the displacement of the collision load input part and an optimization analysis condition for setting, as optimization analysis conditions for the optimization analysis performed in the optimization analysis unit, a predetermined objective function and a constraint condition that the displacements of the plurality of load transmission parts are equal.
  • the optimization analysis condition setting unit further sets the volume constraint rate of the optimization block model as the constraint condition within a range of 3% or more and 7% or less of the entire design space, and the optimization analysis unit Optimization analysis using the density method of topology optimization should be performed.
  • An optimization analysis program for a load transmission structure in a body frame part of an automobile distributes a collision load input to the body frame part in a collision test of an automobile comprising the body frame part and a plurality of load-bearing parts. and the load-bearing parts are modeled by plane elements and/or three-dimensional elements.
  • a vehicle body model acquisition unit that acquires a vehicle body model of all or part of an automobile, a design space setting unit that sets a design space in an area of the vehicle body model in which the load transmission structure is arranged, and the set design space.
  • an optimization block model generation unit that generates an optimization block model that is modeled with three-dimensional elements and performs analysis processing for optimizing the load transmission structure;
  • a coupling processing unit that generates an optimization analysis model, an analysis condition setting unit that sets analysis conditions for performing the optimization analysis processing, and an optimal structure of the optimization block model under the set analysis conditions. and a function to be executed as an optimization analysis unit that performs an optimization analysis for obtaining the
  • a collision load input part and load transmission part setting unit that sets a load transmission part as a part that transmits a load to each of the load parts in the optimization analysis model, and a load that is equal to or less than the withstand load of each of the plurality of load bearing parts.
  • a load-bearing part transmission load determining unit that determines the transmission load at the load-transmitting part of each of the load-bearing parts by distributing the collision load input to the optimization analysis model as follows; a load condition that sets the transmission load to each of the load-bearing parts as the reaction force of the collision load and is used as the input load to the optimized analysis model; a constraint condition that restrains the displacement of the collision load input part; a load constraint condition setting unit that sets a predetermined objective function as optimization analysis conditions for the optimization analysis performed in the optimization analysis unit; function as an optimization analysis condition setting unit that sets the
  • the optimization analysis condition setting unit further sets the volume constraint rate of the optimization block model as the constraint condition within a range of 3% or more and 7% or less of the entire design space, and the optimization analysis unit Optimization analysis using the density method of topology optimization should be performed.
  • a load condition in which a transmission load equal to or less than the withstand load of each load-bearing part is input as a reaction force of a collision load to a plurality of load-transmitting parts of a vehicle body frame part, and a collision load input part of the vehicle body frame part.
  • a constraint condition that constrains the displacement and a constraint condition that equalizes the displacements of a plurality of load transmission parts are set as analysis conditions, and an optimization analysis is performed to find the optimum load transmission structure.
  • the optimum load transmission structure is determined using the above optimization analysis, the shape of the load transmission member is determined based on the determined optimum load transmission structure, and the determined shape of the load transmission member A load transmission member is manufactured according to As a result, it is possible to manufacture a load transmission member capable of appropriately distributing the load transmitted from the vehicle body frame component to the plurality of load-bearing components.
  • FIG. 1 is a block diagram of an optimization analysis apparatus for a load transmission structure in a vehicle body frame part of an automobile according to Embodiment 1 of the present invention.
  • FIG. 2 is a diagram showing a design space set for a vehicle body model and an optimized block model generated in the design space in Embodiment 1 of the present invention.
  • FIG. 3 is a diagram illustrating load conditions and constraint conditions set in the optimization analysis model as invention examples in Embodiment 1 and Example of the present invention ((a) Perspective view (vehicle interior), ( b) Perspective view (vehicle exterior)).
  • FIG. 4A and 4B are diagrams showing an optimum structure of a load transmission structure in a side sill as an invention example in Embodiment 1 and Example of the present invention ((a) perspective view, (b) cross-sectional view).
  • FIG. 5 is a flowchart showing the flow of processing of the optimization analysis method for the load transmission structure in the vehicle body frame part of the automobile according to Embodiment 1 of the present invention.
  • FIG. 6 is a diagram for explaining load conditions and restraint conditions set in the optimization analysis model as a comparative example in the embodiment ((a) perspective view (vehicle interior), (b) perspective view (vehicle exterior) ).
  • FIG. 5 is a flowchart showing the flow of processing of the optimization analysis method for the load transmission structure in the vehicle body frame part of the automobile according to Embodiment 1 of the present invention.
  • FIG. 6 is a diagram for explaining load conditions and restraint conditions set in the optimization analysis model as a comparative example in the embodiment ((a) perspective view (ve
  • FIG. 7 is a diagram showing a comparative example of the optimum structure of the load transmission structure in the side sill in the example ((a) perspective view, (b) cross-sectional view).
  • FIG. 8 is a diagram showing an example of a vehicle body of an electric vehicle.
  • FIG. 9 is a diagram illustrating a side impact test in which the pole collides with the vehicle body from the outside in the width direction of the vehicle body.
  • the body of an automobile which is the object of the present invention, will be described.
  • the X direction, the Y direction and the Z direction indicate the longitudinal direction of the vehicle body, the width direction of the vehicle body and the vertical direction of the vehicle body, respectively.
  • the present invention is directed to a vehicle body 100 including side sills 105, which are vehicle body frame parts, floor cross members 107, which are load-bearing parts, and battery case fixing parts 109.
  • the body frame parts are the body parts that make up the body frame.
  • the side sills 105 are vehicle body frame parts that are arranged on both sides in the width direction of the vehicle body so as to extend in the longitudinal direction of the vehicle body. As shown in FIG. 9, upper end portions and lower end portions of a side sill inner 105a and a side sill outer 105b having a hat cross-sectional shape are joined to each other so that the opening sides face each other to form a closed cross-sectional space.
  • the load-bearing parts are parts that are not allowed to deform in order to prevent the collision load input to the vehicle body from being input to other vehicle body parts as they are.
  • the battery case 103 is fixed by connecting two floor cross members 107a and 107b arranged in the longitudinal direction of the vehicle body and abutting on the side sill inner 105a to the lower part of the battery case 103 (battery case lower 103b) and the side sill inner 105a.
  • a battery case fixing component 109 used for the battery case is provided.
  • the side sill 105, the floor cross member 107, and the battery case fixing part 109 are modeled using planar elements and/or three-dimensional elements, and modeled element information and the like are stored in the vehicle body model file 31 (see FIG. 1) described later. You can store it.
  • load transmission structure optimization analysis method the optimization analysis method, apparatus, and program for the load transmission structure in the vehicle body frame part of the automobile according to the present invention
  • load transmission structure optimization analysis method the optimization analysis method, apparatus, and program for the load transmission structure in the vehicle body frame part of the automobile according to the present invention
  • a load transmission structure optimization analysis device 1 distributes a collision load input to a vehicle body frame part at the time of a collision of an automobile comprising a vehicle body frame part and a plurality of load-bearing parts, and divides the load into a plurality of load-bearing parts. It seeks the optimum load transmission structure to transmit to the load-bearing parts.
  • the load transfer structure optimization analysis device 1 is configured by a PC (personal computer) or the like, and includes a display device 3, an input device 5, and a memory storage device.
  • the display device 3, the input device 5, the storage device 7, and the working data memory 9 are connected to the arithmetic processing section 11, and their respective functions are executed by commands from the arithmetic processing section 11.
  • FIG. Hereinafter, each configuration of the load transmission structure optimization analysis device 1 according to the present embodiment will be described.
  • the display device 3 is used to display analysis results, etc., and is composed of a liquid crystal monitor (LCD monitor) or the like.
  • the input device 5 is used for instructing display of the vehicle body model file 31 and inputting conditions by the operator, and is composed of a keyboard, a mouse, and the like.
  • the storage device 7 is used for storing various files such as the vehicle body model file 31, and is composed of a hard disk or the like.
  • the working data memory 9 is used for temporary storage and calculation of data used by the arithmetic processing unit 11, and is composed of a RAM (Random Access Memory) or the like.
  • the arithmetic processing unit 11 includes a vehicle body model acquiring unit 13, a design space setting unit 15, an optimized block model generating unit 17, a coupling processing unit 19, an analysis condition setting unit 21, an optimal It has a transformation analysis unit 23 and is configured by a CPU (central processing unit) such as a PC.
  • a CPU central processing unit
  • Each of these units functions when the CPU executes a predetermined program. Functions of the above-described units in the arithmetic processing unit 11 will be described below.
  • the vehicle body model acquisition unit 13 acquires a vehicle body model of all or part of an automobile in which the vehicle body frame parts and load-bearing parts are modeled by plane elements and/or three-dimensional elements.
  • the vehicle body model acquiring unit 13 includes a side sill 105 that is a vehicle body frame component, a floor cross member 107 that is a load bearing component, and a battery case fixing component 109 as plane elements.
  • a body model 110 of a portion of a modeled automobile is obtained.
  • the design space setting unit 15 sets an area in which the load transmission structure can be arranged in the vehicle body model as a design space.
  • the design space setting unit 15 defines a region in the vehicle body model 110 in which the load transmission structure can be arranged, as shown in FIG. A design space 111 is set up.
  • the optimization block model generation unit 17 generates an optimization block model that is modeled with three-dimensional elements in the design space set by the design space setting unit 15 and subjected to optimization analysis processing.
  • the optimized block model generating section 17 generates an optimized block model 113 in the design space 111 set by the design space setting section 15, as shown in FIG.
  • the combination processing unit 19 combines the optimized block model generated by the optimized block model generation unit 17 with the vehicle body model to generate an optimized analysis model.
  • the coupling processing unit 19 couples the optimization block model 113 to the side sill 105 in the vehicle body model 110 (see FIG. 9) to generate the optimization analysis model 120.
  • FIG. 1 In the optimization analysis model 120 shown in FIG. 2, the display of the floor cross member 107 and the battery case fixing part 109, which are load-bearing parts, is omitted.
  • the analysis condition setting unit 21 sets analysis conditions for optimization analysis processing, and as shown in FIG. It has a section 21b, a load constraint condition setting section 21c, and an optimization analysis condition setting section 21d.
  • the collision load input part and load transmission part setting unit 21a selects a collision load input part to which a collision load is input in the vehicle body frame part of the optimization analysis model, and a vehicle body frame part that transmits the load to each of a plurality of load-bearing parts.
  • a plurality of load transmission parts are set in the part in.
  • a side collision in which the pole 200 collides with the side sill 105 on the outside in the vehicle width direction is targeted. Therefore, as shown in FIG.
  • the collision load input part and load transmission part setting unit 21a sets the collision load input part 121 to the part to which the collision load is input in the side sill 105 of the optimization analysis model 120, and the load resistance from the side sill 105.
  • a plurality of (three) load transmission portions 123 are set at portions where the load is transmitted to the floor cross member 107 and the battery case fixing member 109 which are load components.
  • the load-bearing part transmission load determining unit 21b distributes the collision load to be input to the optimization analysis model below the load-bearing load of a plurality of load-bearing parts, and determines the transmission load to the load-bearing parts at each load-transmitting part. be.
  • the transmission load should be determined by the placement and strength of each load-bearing part. What is important in determining the transmitted load is not its absolute value but its distribution, and the sum of the transmitted loads set to a plurality of load transmitting parts is distributed so as to be equal to the collision load input to the vehicle body frame parts. Further, the collision load to be input to the vehicle body frame part can be set as appropriate, but it is preferable to obtain the collision load by performing a collision analysis for the side collision test shown in FIG. 9, for example.
  • load-bearing part transmission load determination unit 21b distributes the collision load input to optimization analysis model 120 to the load-bearing load of floor cross member 107 and battery case fixing part 109 or less. Then, the transmission load at the load transmission portions 123a and 123b that transmit the load to the two floor cross members 107 is determined to be 200 kN, and the transmission load at the load transmission portion 123c of the battery case fixing member 109 is determined to be 300 kN.
  • the load constraint condition setting section 21c sets the transmission load to the load-bearing parts determined by the load-bearing part transmission load determination section 21b as the reaction force of the collision load for each of the load-bearing parts, and adds the load to the optimized analysis model. and a constraint condition that constrains the displacement of the collision load input portion.
  • the load constraint condition setting unit 21c impinges the transmission loads (200 kN, 200 kN and 300 kN) to the floor cross member 107 and the battery case fixing part 109 against the load transmission parts 123a, 123b and 123c.
  • a load condition that is set as a reaction force of the load (700 kN) to be an input load to the optimization analysis model 120 and a constraint condition that restricts the displacement of the collision load input portion 121 are set.
  • Setting the transmission load as a reaction force of the collision load to the load transmission portion means setting the transmission load to act on the load transmission portion in a direction opposite to the input direction of the collision load.
  • the optimization analysis condition setting unit 21d sets, as optimization analysis conditions for optimization analysis, a predetermined objective function and a constraint condition that the displacements of a plurality of load transmission parts are equal.
  • the objective function is set according to the optimization objective. For example, mass minimization, compliance minimization (stiffness maximization), displacement minimization displacement minimization, etc.
  • the minimization of the displacement of the load transmitting portion 123 is set as the objective function.
  • Constraints on the other hand, impose some restrictions on optimization, and in the present invention, as described above, the displacements of multiple load transmission parts are assumed to be equal. Multiple constraints can be set. Then, the volume constraint rate of the optimized block model (the ratio of the volume of the optimized block model remaining after the optimization process to the volume of the design space) is set to a predetermined value within the range of 3% to 7% of the volume of the entire design space. It is preferable to further set a constraint condition that is equal to or less than the value of .
  • the optimization analysis unit 23 is a step of performing optimization analysis for obtaining the optimum structure of the optimized block model under the analysis conditions set by the analysis condition setting unit 21 .
  • the optimization analysis unit 23 causes the optimization analysis model 120 generated by the combination processing unit 19 to combine the optimization block model 113 and the vehicle body model 110 into Under the set load conditions, constraint conditions, and optimization analysis conditions (objective function, constraint conditions), optimization analysis is performed with the optimization block model 113 as the analysis target for optimization, and the optimization of the optimization block model 113 is performed. structure. Then, the optimum structure of the optimized block model 113 is obtained as the optimum load transmission structure for transmitting the load to the plurality of load-bearing parts.
  • topology optimization can be applied to the optimization analysis by the optimization analysis unit 23. Then, if there are many intermediate densities when using the density method in topology optimization, it is preferable to discretize by giving a penalty coefficient as an optimized parameter. Note that the value of the penalty coefficient can be set as appropriate.
  • FIG. 4 shows the result of obtaining the optimum structure 125 of the optimized block model 113 by applying topology optimization to the optimization analysis unit 23 in this embodiment.
  • the floor cross member 107 and the battery case fixing part 109 are omitted.
  • the optimal structure 125 of the optimization block model 113 is configured so that the optimization block model 113 satisfies the analysis conditions (load condition, constraint condition, objective function, constraint condition) set by the analysis condition setting unit 21. Constituent three-dimensional elements are found by remaining and disappearing.
  • the optimization analysis unit 23 may perform topology optimization as described above, or may perform optimization analysis using another calculation method. Also, as the optimization analysis unit 23, for example, commercially available analysis software using the finite element method can be used.
  • a structural optimization analysis method distributes a collision load input to a vehicle body frame part and a plurality of load-bearing parts to a plurality of load-bearing parts when a vehicle crashes.
  • the optimum load transmission structure to be transmitted to the load component is obtained by the computer performing the following steps.
  • the structural optimization analysis method includes, as shown in FIG. and an optimization analysis step S11. Each of the above steps will be described below with reference to the vehicle body 100 of the electric vehicle shown in FIG.
  • the vehicle body model acquisition step S1 is a process of acquiring a vehicle body model of all or part of an automobile in which the vehicle body frame parts and load-bearing parts are modeled by plane elements and/or three-dimensional elements.
  • the vehicle body model acquisition unit 13 of the load transmission structure optimization analysis device 1 acquires the side sill 105, which is a vehicle body frame component, the floor cross member 107, which is a load bearing component, and the battery case.
  • a vehicle body model 110 of a part of an electric vehicle modeled by a plane element is obtained.
  • the design space setting step S3 is a step of setting an area in the vehicle body model in which the load transmission structure can be arranged as a design space.
  • the design space setting unit 15 of the load transmission structure optimization analysis device 1 can arrange the load transmission members in the vehicle body model 110 as shown in FIGS.
  • the optimized block model generating step S5 is a step of generating an optimized block model modeled with three-dimensional elements in the design space set in the design space setting step S3 and subjected to optimization analysis processing.
  • the optimization block model generation unit 17 of the load transmission structure optimization analysis device 1 creates a model between the side sill inner 105a and the side sill outer 105b as shown in FIG.
  • An optimized block model 113 is generated in the design space 111 set to .
  • the coupling processing step S7 is a step of coupling the optimized block model generated in the optimized block model generation step S5 to the vehicle body model to generate an optimized analysis model.
  • the coupling processing unit 19 of the load transfer structure optimization analysis apparatus 1 couples the optimization block model 113 to the vehicle body model 110 to generate the optimization analysis model 120.
  • the analysis condition setting step S9 is for setting analysis conditions for the optimization analysis process. As shown in FIG. It includes a step S9b, a load constraint condition setting step S9c, and an optimization analysis condition setting step S9d.
  • the collision load input part and load transmission part setting step S9a is a car body frame part that transmits the load to each of the collision load input parts and the load-bearing parts, which are the parts to which the collision load is input in the car body frame part of the optimized analysis model.
  • a load transmission part is set to the part in .
  • the object is a side collision in which the pole 200 collides with the side sill 105 on the outside in the vehicle width direction. Therefore, as shown in FIG.
  • a collision load input portion 121 is added to the portion of the side sill 105 of the optimization analysis model 120 to which the collision load is input, and from the side sill 105, the floor cross member 107 as a load-bearing component and the battery case fixing component
  • Load transmission portions 123a, 123b, and 123c are set as portions to which the load is transmitted to 109.
  • the collision load input portion 121 in the side sill 105, and the load transmission portions 123a, 123b, and 123c to the floor cross member 107 and the battery case fixing part 109 are, as shown in FIG. It is preferable to perform a side collision analysis in which the pole 200 collides with the side sill 105 from the outside of the vehicle body model 110 in the vehicle width direction, and set based on the result of the side collision analysis.
  • the load-bearing parts transmission load determination step S9b distributes the collision load to be input to the optimization analysis model to a load below the load-bearing load of a plurality of load-bearing parts, and determines the transmission load to the load-bearing parts at each load-transmitting part. be.
  • the transmission load should be determined by the placement and strength of each load-bearing part. Furthermore, the sum of the transmission loads set to the plurality of load transmission portions is distributed so as to be equal to the collision load input to the vehicle body frame component.
  • the load-bearing part transmission load determination unit 21b of the load transmission structure optimization analysis device 1 determines the side sill 105 in the optimization analysis model 120 as shown in FIG.
  • the impact load (700 kN) input to the is distributed below the withstand load of the floor cross member 107 and the battery case fixing part 109, and the transmission load (each 200 kN) at the load transmission parts 123a and 123b of the floor cross member 107 and the battery case fixing
  • a transmission load (300 kN) at the load transmission portion 123c of the part 109 is determined.
  • the collision load to be input to the side sill 105 and the transmission load to the floor cross member 107 and the battery case fixing part 109 are obtained by the side collision analysis of the vehicle body model 110 as shown in FIG. and determined based on the results of the side impact analysis.
  • the load to be transmitted to the load-bearing parts determined in the load-bearing part transmission load determination step S9b is set as the reaction force of the collision load for each of the load-bearing parts, and is added to the optimized analysis model. and a constraint condition that constrains the displacement of the collision load input portion.
  • the load constraint condition setting unit 21c of the load transmission structure optimization analysis device 1 sets the load to the floor cross member 107 and the battery case fixing part 109 as shown in FIG. a load condition in which the transmission loads (200 kN, 200 kN, and 300 kN) are set as reaction forces of the collision loads (700 kN) to the load transmission portions 123a, 123b, and 123c, respectively, and are input to the optimization analysis model 120; and a constraint condition that constrains the displacement of the collision load input portion 121 is set.
  • the optimization analysis condition setting step S9d sets, as optimization analysis conditions for the optimization analysis, a predetermined objective function and a constraint condition that the displacements of the plurality of load transmission parts are equal.
  • the optimization analysis condition setting unit 21d of the load transmission structure optimization analysis device 1 sets, as the optimization analysis condition, the objective function for minimizing the displacement of the load transmission part and a constraint that the displacements of the plurality of load transmission portions 123a, 123b, and 123c are equal.
  • a plurality of constraint conditions can be set in the optimization analysis condition setting step S9d. Furthermore, as a constraint condition, the volume constraint rate of the optimization block model (ratio of the volume of the optimization block model remaining after the optimization process to the volume of the design space) should be 3% or more and 7% or less of the volume of the entire design space. It is preferable to set within the range. Therefore, in the present embodiment, in addition to the constraint that the displacements of the load transmission parts 123a, 123b, and 123c are equal, the volume constraint rate of the optimization block model 113 is set to 5% of the volume of the entire design space 111. Set constraints.
  • the optimization analysis step S11 is a step of performing an optimization analysis for obtaining the optimum structure of the optimized block model under the analysis conditions set in the analysis condition setting step S9.
  • the optimization analysis unit 23 of the load transmission structure optimization analysis device 1 sets the analysis conditions (load Under the conditions and constraints and optimization analysis conditions (objective function, constraint conditions), optimization analysis is performed with the optimization block model 113 as the optimization analysis target, and as shown in FIG. 4, the optimization block model Find the optimal structure 125 of 113 . Then, the optimum structure 125 of the optimized block model 113 is obtained as the optimum load transmission structure of the side sill 105 that transmits the load to the multiple load-bearing parts.
  • topology optimization can be applied to the optimization analysis in the optimization analysis step S11.
  • the density method is used in topology optimization and there are many intermediate densities, it is preferable to discretize by giving a penalty coefficient as an optimization parameter.
  • the value of the penalty coefficient can be set appropriately.
  • the optimal structure 125 of the optimized block model 113 is such that solid elements constituting the optimized block model remain and It is obtained by erasing.
  • the optimization analysis step S11 may perform topology optimization as described above, or may be optimization analysis using another calculation method.
  • optimization analysis in the optimization analysis step for example, commercially available analysis software using the finite element method can also be used.
  • the present embodiment 1 is a load transmission structure optimization analysis device 1 (Fig. It can be configured as a load transmission structure optimization analysis program that causes each part in the arithmetic processing part 11 of 1) to function.
  • a load transmission structure optimization analysis program divides a collision load input to a vehicle body frame part and a plurality of load-bearing parts into a plurality of load-bearing parts when a vehicle crashes.
  • the object is to find an optimum load transmission structure for transmitting the load to the load-bearing parts of the above.
  • the load transmission structure optimization analysis program comprises a computer, like the arithmetic processing unit 11 shown in FIG. 19, an analysis condition setting unit 21, and an optimization analysis unit 23.
  • the load transmission structure optimization analysis program includes an analysis condition setting unit 21, a collision load input part and load transmission part setting unit 21a, a load-bearing part transmission load determination unit 21b, a load constraint condition setting unit 21c, an optimum It functions as a chemical analysis condition setting unit 21d.
  • the collision load input to the vehicle body frame part is distributed to the transmission load that is equal to or less than the withstand load of the plurality of load-bearing parts, and the distributed transmission We set the load condition that the load is input to the body frame parts as a reaction force of the collision load, and the constraint condition that restricts the displacement of the part where the collision load is input to the body frame parts, and optimize the load transmission structure. conversion processing.
  • the collision load input to the body frame parts can be distributed and transmitted to loads below the load-bearing load of the load-bearing parts.
  • the deformation of the battery case 103 can be prevented even in the event of a side collision of an electric vehicle having a vehicle body 100 in which the battery 101 is housed in the battery case 103. can be protected.
  • the embodiment according to the present invention described above is a battery case of an electric vehicle including a cabin space inside the vehicle and a battery-equipped BEV (Battery Electronic Vehicle) or PHV (Plug-in Hybrid Vehicle) at the time of a side collision.
  • BEV Battery Electronic Vehicle
  • PHV Plug-in Hybrid Vehicle
  • the present invention is not limited to the case of protecting the battery case in the event of a side collision of an electric vehicle, and may be intended for other forms of collision, vehicle body frame parts, and load-bearing parts.
  • the car body frame parts that are the target of car body structure design that takes into consideration the distribution of transmitted loads are the front side members in front collisions, and the small overlap frontal collisions. ) includes the front pillar lower.
  • the collision load is input to the front side members via the bumper reinforcement, transmitted to the crash box and front side members, and then from the front side members to the dash panel and The load is distributed to the side sills.
  • the dash panel or side sills are load-bearing parts that are not allowed to deform in order to protect the cabin space in the event of a frontal collision.
  • the collision load input to the front pillar lower through the front side members and tires is distributed from the front pillar lower to the side sills and front pillar upper (front pillar upper). be.
  • the side sills and front pillar uppers are deformed, there is a danger that they will enter the cabin space and injure the occupants. Therefore, in order to protect the cabin space in the event of a small overlap collision, the side sills and front pillar uppers are load-bearing parts that are not allowed to deform.
  • the load-bearing parts to which the load is to be transmitted have a load-bearing capacity that must not be exceeded. Is required.
  • the present invention can also be applied to a stiffening member that stiffens a vehicle body frame part, and the structure of the stiffening member of the vehicle body frame part takes into consideration the distribution of the transmitted load to the load-bearing parts of the vehicle body. It is possible to obtain design guidelines for shapes and shapes.
  • the above description is based on the description of a portion of the vehicle body of an automobile that includes side sills 105, which are vehicle body frame components, floor cross members 107, which are load-bearing components, and battery case fixing components 109, as illustrated in FIG.
  • side sills 105 which are vehicle body frame components
  • floor cross members 107 which are load-bearing components
  • battery case fixing components 109 battery case fixing components
  • the present invention manufactures a load transmission member for the vehicle body frame parts based on the found load transmission structure. It can be configured as a method. That is, in the method for manufacturing a load transmission member in a vehicle body frame part of an automobile according to Embodiment 2 of the present invention, the load transmission structure of the vehicle body frame part according to Embodiment 1 is optimized using the vehicle body. The structure of the load transmission member of the frame part is determined, and the load transmission member is manufactured based on the determined structure of the load transmission member.
  • the optimum structure 125 shown in FIG. determines the shape of the load transmission member based on Then, the load transmission member is designed and manufactured according to the determined shape of the load transmission member.
  • the optimum structure 125 required It is sufficient to design the shape so that the ridge line section of the sheet metal member is aligned with the columnar parts (for example, 125a, 125b, 125c in FIG. 4 described later) that can be seen inside, and the optimum structure ) 125, it is desirable to adjust the strength of the ridgeline portion of the sheet metal member according to the thickness of each columnar portion.
  • the strength of the ridge is adjusted by changing the thickness and material strength of the sheet metal member.
  • load transmission members can be used with the shape of the optimum structure 125 as it is. The maximum effect is obtained by manufacturing.
  • the collision load input to the body frame parts can be distributed and transmitted to a load that is less than the load capacity of multiple load-bearing parts. Space can be protected.
  • the side impact analysis shown in FIG. 9 was performed, and the impact load input portion and the impact load on the side sill 105 were determined as shown in FIG.
  • the side impact analysis it was assumed that a pole with a diameter of 250 mm collided with the side of the side sill 105 and the middle position between the two floor cross members 107 .
  • the vehicle body model 110 was acquired as the analysis target for the optimization analysis of the load transmission structure of the vehicle body frame parts.
  • the vehicle body model 110 is formed by modeling the side sill 105, which is a vehicle body frame component, and the floor cross member 107 and the battery case fixing component 109, which are load bearing components, using planar elements.
  • a design space 111 was set in the closed cross-sectional space between the side sill inner 105a and the side sill outer 105b as a region in which the load transmission structure in the vehicle body model 110 can be arranged.
  • an optimization block model 113 to be subjected to optimization analysis processing was generated, and the optimization block model 113 was combined with the vehicle body model 110 to generate an optimization analysis model 120.
  • the collision load input portion 121 is the portion where the pole 200 contacts the side sill 105 in the side collision analysis.
  • the load transmission parts 123 are the parts (123a and 123b) where the side sill 105 and the floor cross member 107 are connected, and the part where the side sill 105 and the battery case fixing part 109 are connected. (123c).
  • the transmission load transmitted from the side sill 105 to the floor cross member 107 and the battery case fixing part 109 was determined.
  • the transmission load at the load transmission portion 123c where the load is transmitted was determined to be 300 kN.
  • the transmission loads (200 kN, 200 kN and 300 kN) to the floor cross member 107 and the battery case fixing parts 109 are applied to the load transmission portions 123a, 123b and 123c, respectively. and a constraint condition for restricting the displacement of the collision load input portion 121 are set.
  • the optimization processing of the optimization block model was performed, and the optimum structure of the optimization block model was obtained as the optimum load transmission structure.
  • the objective function that minimizes the displacement of the collision load input part 121 and the constraint condition that the volume constraint rate of the optimized block model is 5% or less of the volume of the entire design space. set.
  • FIG. 4 shows the optimal structure 125 of the optimized block model obtained as an invention example. Furthermore, FIG. 7 shows the optimum structure 127 of the optimized block model obtained as a comparative example.
  • the optimal structure 125 of the optimized block model in the example of the invention includes a portion 125a extending from the upper portion of the side sill outer 105b to the load transmission portions 123a and 123b to the floor cross member 107, and the battery case fixing parts from the lower portion of the side sill outer 105b.
  • the structure has a portion 125c connecting the portions 125a and 125b.
  • the optimum structure 127 of the optimized block model in the comparative example includes a portion 127a extending from the upper portion of the side sill outer 105b to load transmission portions 123a and 123b to the floor cross member 107, and a battery case extending from the lower portion of the side sill outer 105b.
  • the structure has a portion 127b extending to a load transmission portion 123c to the fixed component 109, the portion connecting the portions 127a and 127b seen in the optimal structure 125 of the invention example is not obtained. I didn't. From this, it can be considered that the portion 125c in the optimal structure 125 of the invention example functions to equally minimize the displacements of the three load transmission portions 123a, 123b and 123c.
  • a load transmission test was conducted using the side sill 105 shown in FIG.
  • the optimum structure 125 (invention example) or the optimum structure 127 (comparative example) of the optimized block model was arranged inside the side sill 105, and a load of 700 kN was applied to the collision load input part 121.
  • the transmitted loads at the load transmitting portions 123a and 123b to the floor cross member 107 of the book and the load transmitting portion 123c to the battery case fixing part 109 were obtained.
  • Table 1 shows an analysis of the transmitted load at the load transmission portions 123a, 123b and 123 of the side sill 105 in which the optimized structure 125 of the optimized block model according to the invention example or the optimized structure 127 of the optimized block model according to the comparative example is arranged. Show the results.
  • floor cross member No. 1 and floor cross member No. 2 are the transmitted loads at the load transmitting portions 123a and 123b, respectively, and the transmitted load to the battery case fixing parts is the transmitted load at the load transmitting portion 123c. .
  • the transmitted load at each load transmission portion 123 was able to achieve load distribution almost as intended.
  • the transmitted load to the cross member is 50 kN smaller than the target, and the battery case is fixed.
  • the transmitted load to the part was 100kN larger, which was a result that was significantly different from the target.
  • the collision load input to the vehicle body frame parts is appropriately distributed so that the load is less than the withstand load of the load-bearing parts. It has been shown that it is possible to find an optimal load-transmitting structure that can transmit the load.
  • the optimization analysis of the load transmission structure in the vehicle body frame parts of an automobile seeks the optimum load transmission structure that distributes the collision load input to the vehicle body frame parts at the time of a collision and transmits it to a plurality of load-bearing parts. It is possible to provide a method, an apparatus, a program, and a method of manufacturing a load transmission member in a vehicle body frame component.

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Abstract

La présente invention concerne un dispositif d'analyse d'optimisation d'un élément de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile, le dispositif effectuant les processus suivants lors de la définition de conditions d'analyse pour analyser une optimisation (21) : la définition d'un site d'entrée de charge d'impact (121) et d'une pluralité de sites de transmission de charge (123) dans un composant de squelette de carrosserie de véhicule d'un modèle d'analyse d'optimisation (120) (21a) ; la distribution de la charge d'impact à une pluralité de composants de résistance à la charge au niveau ou en dessous d'une charge de résistance et la détermination d'une charge de transmission au niveau de chacun des sites de transmission de charge (21b) ; la définition d'une condition de charge pour définir les charges de transmission déterminées comme contre-forces de charge d'impact agissant sur les sites de transmission de charge (123), et d'une condition de contrainte pour contraindre le déplacement du site d'entrée de charge d'impact (121) (21c) ; et la définition d'une fonction cible prescrite et d'une condition de limitation dans laquelle des déplacements de la pluralité de sites de transmission de charge (123) sont égaux comme conditions d'analyse d'optimisation (21d).
PCT/JP2022/047586 2022-03-03 2022-12-23 Procédé, dispositif et programme pour effectuer une optimisation d'analyse d'une structure de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile, ainsi que procédé de fabrication d'un élément de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile Ceased WO2023166830A1 (fr)

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KR1020247026681A KR20240128107A (ko) 2022-03-03 2022-12-23 자동차의 차체 골격 부품에 있어서의 하중 전달 구조의 최적화 해석 방법, 장치 및 프로그램, 자동차의 차체 골격 부품에 있어서의 하중 전달 부재의 제조 방법
CN202280093049.9A CN118715520A (zh) 2022-03-03 2022-12-23 汽车车身骨架部件中的载荷传递结构的优化分析方法、装置和程序、以及汽车车身骨架部件中的载荷传递部件的制造方法
MX2024010366A MX2024010366A (es) 2022-03-03 2022-12-23 Metodo, dispositivo y programa para el analisis de optimizacion de la estructura de transferencia de carga en parte de bastidor de carroceria de automovil y metodo de fabricacion de parte de transmision de carga en parte de bastidor de carroceria de automovil.
EP22929972.2A EP4475029A4 (fr) 2022-03-03 2022-12-23 Procédé, dispositif et programme pour effectuer une optimisation d'analyse d'une structure de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile, ainsi que procédé de fabrication d'un élément de transmission de charge dans un composant de squelette de carrosserie de véhicule d'un véhicule automobile

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JP2022032258A JP7306510B1 (ja) 2022-03-03 2022-03-03 自動車の車体骨格部品における荷重伝達構造の最適化解析方法、装置及びプログラム、自動車の車体骨格部品における荷重伝達部材の製造方法
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